: ULTRAFINE COPPER POWDER PMU TYPE ISOTOPIC FRACTION â CU63/CU65 â PURITY 99,999%-99,998% ISOTOPIC COMPOSITION OF NATURAL COPPER: 63/Cu 69,1%= 0,05% and 65/Cu 30,9% +/- 0,05% MATERIAL IS NOT RADIOACTIVE TOTAL GROSS WEIGHT: 3.000.000 GRAMS (THREE MILLION GRAMS)